According to an eMarketer study, the continue shift toward online advertising determines a continued shift toward online advertising.
From 2011 to 2014, the US online ad spending is projected to grow by 10.5%, to $40.5bn.
According to eMarketer predictions, online video advertising will remain the fastest-growing format until 2014, while search will continue to get the most dollars.
In what concerns the total media ad spending, it will reach to $188.5 bn in 2014, up from $168.5 billion this year.
Faster growth online will help propel digital from 15.3% of total US ad spending in 2010 to 21.5% by 2014.